/* Reset and Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --color-bg-primary:     #F2F0EB;
    --color-bg-image:       #1b2b41;
    --color-text-primary:   #0D0C0A;
    --color-text-secondary: #3A3835;
    --color-text-muted:     #6B6862;
    --color-border:         #C8C5BE;
    --color-border-strong:  #0D0C0A;
    --color-pill-bg:        #0D0C0A;
    --color-pill-text:      #F2F0EB;

    /* Typography */
    --font-primary:       'Inter', 'Helvetica Neue', 'Arial', sans-serif;
    --text-display:       clamp(52px, 9vw, 88px);
    --text-h1:            clamp(28px, 4vw, 42px);
    --text-h2:            clamp(18px, 2.2vw, 24px);
    --text-body:          clamp(13px, 1.2vw, 15px);
    --text-label:         clamp(11px, 1vw, 13px);
    --text-marquee:       clamp(60px, 12vw, 120px);
    --tracking-display:   -0.03em;
    --tracking-heading:   -0.02em;
    --tracking-body:       0em;
    --tracking-label:      0.01em;
    --tracking-marquee:   -0.02em;
    --leading-display:    0.95;
    --leading-heading:    1.1;
    --leading-body:       1.55;
    --leading-label:      1.4;

    /* Spacing */
    --space-1:   4px;
    --space-2:   8px;
    --space-3:  12px;
    --space-4:  16px;
    --space-5:  24px;
    --space-6:  32px;
    --space-7:  48px;
    --space-8:  64px;
    --space-9:  80px;
    --space-10: 96px;
    --space-11: 128px;
    --space-12: 160px;
    --section-padding-x: clamp(20px, 4vw, 48px);
    --section-padding-y: clamp(32px, 5vw, 64px);
    --container-max:     1440px;
    --container-gutter:  clamp(20px, 4vw, 48px);

    /* Motion */
    --ease-standard:      cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out:           cubic-bezier(0, 0, 0.2, 1);
    --ease-in:            cubic-bezier(0.4, 0, 1, 1);
    --duration-fast:      120ms;
    --duration-default:   200ms;
    --duration-slow:      350ms;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-body);
    line-height: var(--leading-body);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Default interactive transitions */
a, button, .pill, .social-icon {
    transition: opacity var(--duration-fast) var(--ease-standard);
}

/* Focus styles */
*:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 3px;
    border-radius: 2px;
}

/* ─── Navigation ─── */
.nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--container-gutter);
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-bg-primary);
}

.pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 16px;
    border-radius: 9999px;
    background: var(--color-pill-bg);
    color: var(--color-pill-text);
    font-size: var(--text-label);
    font-weight: 500;
    letter-spacing: 0.01em;
    cursor: pointer;
    text-decoration: none;
    border: none;
    font-family: inherit;
}

.pill:hover {
    opacity: 0.8;
}

.pill--counter {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
}

/* ─── Horizontal Rule / Divider ─── */
.rule {
    width: 100%;
    height: 1px;
    background: var(--color-border);
    border: none;
    margin: 0;
}

.rule--heavy {
    background: var(--color-border-strong);
}

/* ─── Parenthetical Label ─── */
.label-paren {
    font-size: var(--text-label);
    font-weight: 400;
    color: var(--color-text-muted);
    letter-spacing: var(--tracking-label);
    line-height: var(--leading-label);
}

/* ─── Arrow Indicator ─── */
.arrow-indicator {
    font-size: inherit;
    line-height: 1;
    display: inline-block;
}

/* ─── Hero Header ─── */
.hero-header {
    padding: var(--space-5) var(--container-gutter) var(--space-6);
    display: grid;
    grid-template-rows: auto auto;
    animation: fadeInHero 0.6s var(--ease-out) 0.3s both;
}

.hero-header__title {
    font-size: var(--text-display);
    font-weight: 800;
    line-height: var(--leading-display);
    letter-spacing: var(--tracking-display);
    color: var(--color-text-primary);
    max-width: 14ch;
}

.hero-header__subtitle {
    font-size: var(--text-display);
    font-weight: 800;
    line-height: var(--leading-display);
    letter-spacing: var(--tracking-display);
    color: var(--color-text-primary);
}

.hero-header__meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-4);
}

.hero-header__scroll {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-label);
    color: var(--color-text-muted);
}

/* ─── Hero Image / Particle Canvas ─── */
.hero-image {
    width: 100%;
    aspect-ratio: 16 / 7;
    background: var(--color-bg-image);
    display: block;
    position: relative;
    overflow: hidden;
    animation: fadeInImage 0.5s var(--ease-out) 0.15s both;
}

.hero-image canvas {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

/* ─── About Section ─── */
.about {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    padding: var(--space-8) var(--container-gutter);
    gap: 0;
}

.about__statement {
    font-size: var(--text-h1);
    font-weight: 700;
    line-height: var(--leading-heading);
    letter-spacing: var(--tracking-heading);
    color: var(--color-text-primary);
    max-width: 18ch;
    padding-right: var(--space-8);
}

.divider-vertical {
    width: 1px;
    background: var(--color-border);
    align-self: stretch;
}

.about__sidebar {
    padding-left: var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--space-8);
}

.about__sidebar-label {
    align-self: flex-start;
}

.about__description {
    font-size: var(--text-body);
    color: var(--color-text-secondary);
    line-height: var(--leading-body);
    max-width: 38ch;
}

.about__description p {
    margin-bottom: var(--space-4);
}

.about__description p:last-child {
    margin-bottom: 0;
}

/* ─── Social Icons ─── */
.social-icons {
    display: flex;
    gap: var(--space-3);
    align-items: center;
}

.social-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-pill-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
}

.social-icon:hover {
    opacity: 0.75;
}

.social-icon svg {
    width: 14px;
    height: 14px;
    fill: var(--color-pill-text);
}

/* ─── Services / Skills Section ─── */
.services {
    padding: var(--space-7) var(--container-gutter);
    border-top: 1px solid var(--color-border-strong);
}

.services__header {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin-bottom: var(--space-6);
}

.services__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-top: 1px solid var(--color-border);
}

.service-item {
    padding: var(--space-6) var(--space-5);
    border-bottom: 1px solid var(--color-border);
}

.service-item:nth-child(odd) {
    border-right: 1px solid var(--color-border);
    padding-right: var(--space-7);
}

.service-item__title {
    font-size: var(--text-h2);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    letter-spacing: var(--tracking-heading);
}

.service-item__description {
    font-size: var(--text-body);
    color: var(--color-text-secondary);
    line-height: var(--leading-body);
    max-width: 35ch;
}

/* ─── Marquee ─── */
.marquee {
    overflow: hidden;
    white-space: nowrap;
    padding: var(--space-4) 0;
    border-top: 1px solid var(--color-border-strong);
}

.marquee__track {
    display: inline-block;
    animation: marquee-scroll 18s linear infinite;
}

.marquee__text {
    font-size: var(--text-marquee);
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: var(--tracking-marquee);
    text-transform: uppercase;
    display: inline;
}

@keyframes marquee-scroll {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* ─── Footer ─── */
.footer {
    padding: var(--space-5) var(--container-gutter);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__text {
    font-size: var(--text-label);
    color: var(--color-text-muted);
}

/* ─── Page Load Animations ─── */
@keyframes fadeInHero {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInImage {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* ─── Responsive: Mobile (<768px) ─── */
@media (max-width: 768px) {
    .hero-header__title {
        font-size: clamp(40px, 10vw, 52px);
    }

    .hero-header__subtitle {
        font-size: clamp(40px, 10vw, 52px);
    }

    .hero-image {
        aspect-ratio: 4 / 3;
    }

    .about {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        padding: var(--space-7) var(--container-gutter);
    }

    .about__statement {
        max-width: none;
        padding-right: 0;
    }

    .divider-vertical {
        width: 100%;
        height: 1px;
        align-self: auto;
    }

    .about__sidebar {
        padding-left: 0;
        gap: var(--space-6);
    }

    .services__grid {
        grid-template-columns: 1fr;
    }

    .service-item:nth-child(odd) {
        border-right: none;
        padding-right: var(--space-5);
    }

    .marquee__text {
        font-size: clamp(40px, 10vw, 60px);
    }

    .marquee__track {
        animation-duration: 25s;
    }

    .footer {
        flex-direction: column;
        gap: var(--space-3);
        text-align: left;
    }
}

@media (max-width: 480px) {
    .hero-header__meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .nav {
        padding: var(--space-3) var(--container-gutter);
    }
}

/* ─── Ghost Pill (nav secondary link) ─── */
.pill--ghost {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.pill--ghost:hover {
    opacity: 1;
    border-color: var(--color-border-strong);
}

/* ─── Writing Section (homepage preview) ─── */
.writing-section {
    padding: var(--space-7) var(--container-gutter);
    border-top: 1px solid var(--color-border-strong);
}

.writing-section__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.writing-section__title-row {
    display: flex;
    align-items: center;
    gap: var(--space-5);
}

.writing-section__posts {
    border-top: 1px solid var(--color-border);
}

.writing-preview-item {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-5) 0;
    border-bottom: 1px solid var(--color-border);
    text-decoration: none;
    color: inherit;
}

.writing-preview-item:hover .writing-preview-item__title {
    opacity: 0.65;
}

.writing-preview-item__meta {
    display: flex;
    align-items: baseline;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.writing-preview-item__title {
    font-size: var(--text-h2);
    font-weight: 700;
    letter-spacing: var(--tracking-heading);
    color: var(--color-text-primary);
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.writing-preview-item__arrow {
    font-size: var(--text-h2);
    color: var(--color-text-muted);
}

/* ─── Blog Post List Page ─── */
.writing-list {
    padding: 0 var(--container-gutter);
}

.post-item {
    display: grid;
    grid-template-columns: 200px 1fr auto;
    align-items: start;
    gap: var(--space-6);
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border);
}

.post-item__date {
    padding-top: 5px;
}

.post-item__title {
    font-size: var(--text-h2);
    font-weight: 700;
    letter-spacing: var(--tracking-heading);
    line-height: var(--leading-heading);
    margin-bottom: var(--space-3);
    color: var(--color-text-primary);
}

.post-item__title a {
    color: inherit;
    text-decoration: none;
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.post-item__title a:hover {
    opacity: 0.65;
}

.post-item__description {
    font-size: var(--text-body);
    color: var(--color-text-secondary);
    line-height: var(--leading-body);
    max-width: 48ch;
}

.post-item__arrow {
    font-size: var(--text-h2);
    color: var(--color-text-muted);
    text-decoration: none;
    padding-top: 4px;
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.post-item__arrow:hover {
    opacity: 0.6;
}

.writing-empty {
    padding: var(--space-8) 0;
    color: var(--color-text-muted);
    font-size: var(--text-body);
}

/* ─── Blog Post Page ─── */
.post-page {
    max-width: 680px;
    margin: 0 auto;
    padding: var(--space-8) var(--container-gutter);
}

.post-page__loading,
.post-page__error {
    padding: var(--space-8) var(--container-gutter);
    color: var(--color-text-muted);
    font-size: var(--text-body);
}

.post-page__error a {
    color: var(--color-text-primary);
}

.post-page__header {
    margin-bottom: var(--space-6);
}

.post-page__title {
    font-size: var(--text-h1);
    font-weight: 700;
    line-height: var(--leading-heading);
    letter-spacing: var(--tracking-heading);
    margin-top: var(--space-3);
}

.post-page__body {
    padding: var(--space-7) 0;
}

.post-page__footer {
    padding-top: var(--space-7);
    border-top: 1px solid var(--color-border);
}

/* ─── Prose (Markdown rendered content) ─── */
.prose {
    font-size: var(--text-body);
    color: var(--color-text-secondary);
    line-height: var(--leading-body);
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
    color: var(--color-text-primary);
    font-weight: 700;
    letter-spacing: var(--tracking-heading);
    margin-top: var(--space-7);
    margin-bottom: var(--space-4);
    line-height: var(--leading-heading);
}

.prose h1 { font-size: var(--text-h1); }
.prose h2 { font-size: var(--text-h2); }
.prose h3 { font-size: clamp(15px, 1.6vw, 18px); }

.prose p {
    margin-bottom: var(--space-5);
}

.prose ul,
.prose ol {
    padding-left: var(--space-6);
    margin-bottom: var(--space-5);
}

.prose li {
    margin-bottom: var(--space-2);
}

.prose a {
    color: var(--color-text-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.prose a:hover {
    opacity: 0.7;
}

.prose strong {
    color: var(--color-text-primary);
    font-weight: 700;
}

.prose em {
    font-style: italic;
}

.prose code {
    font-family: 'SF Mono', 'Fira Code', 'Roboto Mono', monospace;
    font-size: 0.875em;
    background: var(--color-border);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    color: var(--color-text-primary);
}

.prose pre {
    background: var(--color-text-primary);
    color: var(--color-bg-primary);
    padding: var(--space-5);
    border-radius: 4px;
    overflow-x: auto;
    margin-bottom: var(--space-5);
}

.prose pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    color: inherit;
    font-size: var(--text-body);
}

.prose blockquote {
    border-left: 3px solid var(--color-border-strong);
    padding-left: var(--space-5);
    margin: var(--space-5) 0;
    color: var(--color-text-muted);
    font-style: italic;
}

.prose hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-7) 0;
}

.prose img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: var(--space-6) 0;
}

/* ─── Responsive: Blog ─── */
@media (max-width: 768px) {
    .post-item {
        grid-template-columns: 1fr auto;
    }

    .post-item__date {
        grid-column: 1 / -1;
        padding-top: 0;
        margin-bottom: calc(var(--space-2) * -1);
    }

    .post-item__content {
        grid-column: 1;
    }

    .post-item__arrow {
        grid-column: 2;
        grid-row: 2;
        align-self: start;
        padding-top: 5px;
    }

    .writing-preview-item__meta {
        flex-direction: column;
        gap: var(--space-2);
    }
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
    .marquee__track {
        animation-duration: 60s;
    }

    * {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}